Remember the final at-bat of Game 4 of last year’s ALCS between the Astros and Red Sox? The diving catch Andrew Benintendi made on Alex Bregman’s line drive preserved an 8-6 win and put the Red Sox ahead in the series, 3-1. Had Benintendi missed the ball, the bases might have cleared, the series might have been evened, and the Red Sox may never have won their championship.

Let that play serve as a reminder of the importance of great defense and great defensive plays in the postseason. Look at the teams that are having the most success this season — almost all of them are good defensively in sum, though they may have a few spots to patch up.

Those teams are looking to add more to what they have. And the contenders who aren’t strong defensively may be able to do so.

Who are the most notable defenders that could be available at the trade deadline?